Can I buy games with a combination of steam wallet AND credit card money?

i'm pretty sure u can't do that...

I'd recommend just using it right off the credit card.

I don't think so. It would work vice-versa - if you had insufficient Wallet funds it would make up the difference from your card. But not like this.

afaik, Steam store uses the wallet funds first, credit card only if you don't have sufficient wallet funds

you can add custom amounts to steam it being more than 5$.

But withdrawing money from wallet is not possible once you put money in it.

http://www.doctormckay.com/steamwallet.php

To clarify, you want to start with $22.06 on a CC, put $20 into the Steam wallet, and then buy a $5 game and end up with $0 on the credit card and $17.06 in your wallet? I'm pretty sure that's not possible. However, if you're ordering something more expensive than what's left in your wallet it is possible to exhaust the wallet and then cover the remainder with a different funding source.

I just kept buying off a visa gfit card, and when i was down to my last like 80 cents i bought some dlc as a giveaway

You can do it as you said. Steam always takes the money from the wallet first and lets you choose a second payment option.

No need for dirty workarounds.

How do you do this whole, buy with what is in your wallet and use your card for the rest? I am trying to purchase something with a value higher than the current Wallet Limit of $200 and when I go to purchase my only option is to add the other required funds to my Wallet.

Of course, if I try to add the required funds it says it would put be beyond the Wallet Limit and so as of yet, I am unable to buy the item in question. I have put up a Steam Support Ticket but I am unsure of how much longer the aforementioned item will be available, so I figure the more places I ask around the better chance I will have in receiving an answer.